Traction device for truck wheels



Nov. 18, 1924- D. P. DAVIES TRACTION DEVICE FOR TRUCK WHEELS Filed June ll 1923 INVENTOR Patented Nov. 18, 1924. p

UNITED srariasf DAVID r. nAvIEso-r rrr'rsnunon, PENNSYLVANIA,

TRACTION DEVICE FOR TRUCK'WHEELS. 1 1i Application filed nine 1.1, 1923; Seriallio. 644,674.: v a

To all whom it may concewzl:

Be it known that D;\ VID P. Dan -2s, a citi- I zen of the United States, residing at, Pittsburgh, in the, county of Allegheny and State of Pennsylvania, has invented certain new, and use'ful Improvements in Tract.1on l)elowing is a specification.

mud roads while at the same'timc preventing them fromslidingsideways, or skidding, I

' on the said grounds or roads,"

wherein i of a truck wheel equipped withthefcoupler and its associated parts.

Figure 2 is a top plan view ofiith e lcoupler and associated parts. i

folly on which it is positioned. This type.

of wheel always has a solid tire thereon the sides of which usually slope towards the tread thereof. I

Referring in detail to the drawings, the coupler 1 is composed of two metal end plates 2 extendingcircumferentially on the. tire 3, one on-each side thereof, and joined together by the'cross bars 4 and 5, which extend transversely over the tire in an oblique direction, and in parallel alignment one to the other.

ways, when in the engaged position. in proper contact with the surfaces on which they are designed. to functiorn'and, as will hereafter appear as the description proceeds. the said-plates 2 and the said bars 4 and 5 are supplemented with other arts which give the said coupler 1 a firm old' on the tire,

v p I :9a nd9'. Figure 3 is a sectlonal view on line- The lates 2 and the bars 4 and 5 are so bent an proportioned as to be al and make it-proper base from which to siredonthe SitidjlI'G-w I The 4 and'fi serve as traction vmembers-on that partof the tire occupied by'. the

tension traction members in any position dep I coupler :1 and each issubstantially trianguvicesfor Truck Wheels, of which the fol;

:lar incro'ss sectioirhaving its longitudinal outer edge thcreof. 2 .The end p1atcs2 are 'fiatly positioned against respective .sides of the tire =3 andare held in position by the. -bars;4: and 5 to which they are permanently attached. t1,

Tl1een(ls 9'and 9' of theplates 2,- ou -either side of the u'liecl,- cxte n'dover, the edge of the vrim 16, oniwhich the. tire rcsts,:and "are we side walls-converging fronrthcrbasertothe This invention relates to' traction devices fortruckwheels. if g The object of the; device is to provide. "means for increasing the efiicicncy of the said wheels by increasing their traction power when driven over soft'grounds or I 1 attached respectively to. the-tube-section A The invention resides in'the -combination and (L gak-loclcing plateS isposi tioned--intcrand arrangement of parts, and 'in thedetailsi of construction described herein, andiillus t'rated in the "accompanying "drawings;

iuediirte'of thetinwardly extending ends 9 and 9' onphoth sidesaof the wheel. 'iAztuhe. :s ection Bis carried on the inner end of each f v of the locking'plates 8 and when the locking Figure 1 is a view in persp'ectiveof 'a part tube 7yinaconjunction with-th'etube sections A andlC respectivelyattached to the. ends The locking plates-8.; are gattache'd to. Irespectivei lates 2 by means of arms, respectively in icated at 10 and 11. Thea-arm. 10

is permanently secured to the plate 8 and has its outer end formed to providea hook which detachably engages the eye l2i-fixed in the plate 2 on one side of the wheel. The arm 11 is similarly arranged .and engages the eye 13 fixed in theplatc 2 on theiothcr side of the wheel. i

The said plate 8' is of the cxact'dimen- ,sions to fill the space between the inner face of rim (S and the tube section B of the tube r ment with the tube sections A and C, with its sides as well as its bore exactly in line with the sides and bores of the said tube sections A and C, a tensioning bolt 17 passes through all the tube sections A, BV and C threaded engagement with the tube section A,-thu s making-the tube l-practically one continuous tube andholdingthe tube section B in its engaged position as well as and'C of the tube 7, enable thef'cou pler l to 7 i exert a force which is rigid and unyielding on the tire to abandon the 'obliquity'foftheir.

on the said edges of the rim'6, whichiiiesists :anytendency of -traction chains attachedtion "members substantially triangular; in

' cross section and adapted toextendobliquely thereto and placed 3 in fan oblique direction' direction"- on the saidti'rea -ferc'ewhich 1 T pliant chains, 5 placed in the same pos t on,

could not exert.

:v- E ach of the locking-plates is iermed with an angularly disposed flange 16 which= seats against the inner face of the rim-6 for the purpose of preventing the coupler lfjfrom --moving*-'outwardly on the ti're. p As the ends of-the tube 7,on' each side of the wheel, are held a little distance away" from'the sideof the wheel, inthisdevic'e; by

the ends9- and 9 of the plates 2,- the squared: =part 20 of tliebolt=17 has am Ie-rDOm beQ :twe'en it and the side of the wheel in which :to 'turn' when threaded engagemenflifvvith apthe tubesection= A*of"the tube 7. The

of which has a hook at one end connecting it v-with one end of the tube 7, as at li and 15',

*have each of their other ends rotatably con- 40 nected'with the tensioning bolt 17 on the side of the wheel on which eaclrof the said chains 18 is situated; As in an ordinary swiveL'the end "link of the chain 18 on each side of the wheel is provided with anaperture, so constructed and situated as to enable the rounded part of the bolt 17, adja-' cent to the part 20, to turn freely-therein for tens'oning traction members in position. on the tire, in which aperture thesaid part of the'bolt 17 is held by a-knob 21 at its extreme end located within the said link.

The-traction members 19 are not the only traction members the'coupler I can hold in position on the t re, they are only thetraction members selected to illustrate the de-' vice, and are chains extending transversely over-the'tire in an oblique direction, thereby preventing side movementsof the vehicle, and they have their ends on each side ofthe wheel attached to the circumferential chains 18, by which, when the bolt; 17 is rotated in the tube 7,011 each side of the wheel,

7 they are'drawn into their engaged positions on the tire, in which positions they are held as long as the tension is continuedin the said chains Usually,'the chains 18 are notso tensioned asto'wholly prevent a circumferential movementof the traction members; to protect the engine from injury, in

-. case a-rapidly revolving Wheel is suddenly stopped by some unusual obstacle the traction members would give way and would move circumferentially on the tire, thereby breaking the'force of the wheels impact with the said obstacle I'claima", i 1 1. A coupler for traction chains-or other traction members comprising a pair ,ofltracacross a tire tread, an endfplate fixedlymon- Inectcd' to each end air of; and disposed at respcctlve sides efi's'a d tire,

andmeans associated with eaeh of said end plates for locking said couplerupon'the tire and 1 for tensioning Qsaid' chains orfother 13120131011 members 'tire, an adjustable locking L plate ,associated with each of said endplates, and ine'ans ensquared part2O ofthe bolt 17 is adapted for-j.

engagement by a-suitable tool for facilitat vingrthe adjustment of the bolt 17 'in the -"wtube:7. 'The circumferential chains 18, each comprising a pair of end plates, a pair of traction members fixedly connected ,to said 4 end plates, each of said end plates formed with a pair of inwardly extending ends, a

locking plate shiftably mounted intermediate to each pair of said inwardly extending' ends, and means associated; with eachof said locking plates and respective pairof inwardly extending ends forsecuring said coupler in the secured position and for tensioning the traction chains or other't'raction' members in any position desired upon said tire. v

4. A coupler for traction chains or other traction members adapted to be mounted on the tire of a wheel of the type described and comprising -a pair of traction members, an end plate disposed at each side of the tire and fixedly connected with said traction members, each-of said end plates integrally formed with a pair of spaced inwardly extending ends, each of said ends provided with a tube section, a locking plate shiftably mounted intermediate each of said pair of ends and provided with a tube section, and

7 connected to said end plates and tending ends, each with a tube section, a locking plate shiftably mounted intermediate each of said pair of ends and provided with a tube a bolt threadably engagin one of said tube sections, and extending t rough the others of said tube sections for locking said coupler y upon the tire and for tensioning said chains or other traction members in any position 20 desired upon the tire. In testimony whereof I alfix my signature.

DAVID P. DAVIES.

section, and 16 

